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How to Setup an I2C LCD on the Raspberry Pi - Circuit Basics. Connecting an LCD to your Raspberry Pi will spice up almost any project, but what if your pins are tied up with connections to other modules?

No problem, just connect your LCD with I2C, it only uses two pins (well, four if you count the ground and power). In this tutorial, I’ll show you everything you need to set up an LCD using I2C, but if you want to learn more about I2C and the details of how it works, check out our article Basics of the I2C Communication Protocol. BONUS: I made a quick start guide for this tutorial that you can download and go back to later if you can’t set this up right now.

It covers all of the steps, diagrams, and code you need to get started. There are a couple ways to use I2C to connect an LCD to the Raspberry Pi. The PCF8574 converts the I2C signal sent from the Pi into a parallel signal that can be used by the LCD.
How To Install OpenCPN on a Raspberry Pi. EDIT 24 MAY 2016: I've also gone and updating this post to reflect the guide at OpenCPN, instead of just winging it on my own.

Recommended Gear Easy Step-By-Step OpenCPN Install/Compile on a Raspberry Pi for Total Noobs If you follow the OpenCPN documentation, there are two options.
DHT22 Tutorial for Raspberry Pi. After I posted my Raspberry Pi server room rack temperature monitor project, I received a request to make a tutorial on how to measure humidity in addition to temperature with a Raspberry Pi.

The following video demonstrates 2 methods for controlling a DHT22 sensor: The 4 pin DHT22 sensor has 2.54mm spacing so it works with a standard breadboard. It can operate at 3.3V which makes it well suited for the Raspberry Pi. The wiring is very simple. Please make sure you add the 10KΩ pull-up resistor between the 3.3V and the data line. The Adafruit Python DHT Sensor library makes interfacing the DHT22 easy.
Raspberry PI DHT22 humidity sensor with a LCD 16×2 display – Weather station. USB-Port-GPS Module SKU:EZ-0048 - 52Pi Wiki. Description Support Raspberry Pi model A, B, A+, B+, Zero, 2, 3 with its' L80-39 GPS chip inside.Communicates satellite with UART or USB.CP2102 as USB to UART Bridge chip, stable and faster.

Tutorials & Technicalities: Measuring Humidity and Temperature Using a Raspberry Pi. I have a collection of old books and a basement to store them in.

But in fact, I don't do that yet, because I had a suspicion that storing them there would not be healthy to the books. Old books and too much humidity don't go well together, especially if you want to keep the books in a pristine condition. I could, of course, just go to the nearest builders merchant and get a cheap hygrometer for something like €7-15. But I wanted to track the humidity level over a period of at least a week, to see if factors like day/night conditions and changing weather (not to mention the tumble dryer in the next room) have any measurable effect on the level of humidity in the basement room.
Temperature and Humidity using the DHT22 sensor - PrivateEyePi Project. Updated to now support Raspberry Pi 2 This tutorial you will build one or more digital temperature gauges linked to your Raspberry Pi that can be viewed on the WWW or your smart phone.

At the end of the project you will have a WWW dashboard that looks similar to this: What you need: Raspberry Pi Model A or Bthe following parts are available through the PrivateEyePi StoreDHT22 sensor(s) (TS02) , one per temperature reading you want on the dashboard10k resistor (one per sensor) Jumper wire cables and breadboard or wire, soldering iron and solder (JW01, BB01) Step 1: Build and test the Electronics: Purchase a DHT22 digital thermometer and humidity sensorPurchase a 4.7k Ω (ohm) resistorAs per Figure 1 put the resistor between pins 1 and 2 as in the diagramConnect Pin 1 of the sensor to 5V GPIO (Pin 2)Connect Pin 2 of the sensor to and free GPIO pin e.g.

Figure 1. Figure 2.
SSH warning - WARNING: REMOTE HOST IDENTIFICATION HAS CHANGE. Because I frequently use a variety of different SD cards with my RPi B & a DHCP reservation for it based on its hardware MAC address, I kept running into the 'remote host ID has changed' warning whenever I changed cards & tried to access it from my Mac with ssh.

Clearing the SSH key for that MAC address in ~/.ssh/known_hosts on the Mac every time I changed cards would have been annoying so I decided to do (I think) what the warning text suggested by adding a 'correct' host key to that file for each SD card I use. There are different ways to do this but the simplest one I found was as follows: 1. On the Mac, navigate to the ~/.ssh/ folder in Finder. Because files & folders starting with a dot are normally hidden, do this by using the Finder's Go > Go to folder... option (shortcut: Shift + Command + G) & entering "~/.ssh/" (without the quotes) & clicking the "Go" button. 2. 3. 4. 5.

The IO Pi Zero is a 16 channel digital expansion board designed for use on the Raspberry Pi Zero. The board is based around the MCP23017 16-bit I/O expander from Microchip Technology Inc. The IO Pi Zero Expander is powered through the host Raspberry Pi using the GPIO port and extended pins on the GPIO connector allow you to stack the IO Pi Zero along with other expansion boards. Features Arduino, C, Node.js, Windows 10 IOT, Python 2 and Python 3 libraries are available on GitHub.
Hackster. Overview.

How to Set Up the DHT11 Humidity Sensor on the Raspberry Pi - Circuit Basics. The DHT11 temperature and humidity sensor is a nice little module that provides digital temperature and humidity readings. It’s really easy to set up, and only requires one wire for the data signal. These sensors are popular for use in remote weather stations, soil monitors, and home automation systems. Programming the DHT11 and connecting it to a Raspberry Pi is pretty simple too. In this tutorial, I’ll show you how to connect the DHT11 to the Raspberry Pi and output the humidity and temperature readings to an SSH terminal or to an LCD. Then I’ll give you some example programs for programming it with either C or Python. We have another tutorial on the DHT11 for the Arduino that goes into detail on relative humidity and how the DHT11 measures it. But just to quickly summarize… The DHT11 has a surface mounted NTC thermistor and a resistive humidity sensor.
How to Write and Run a Python Program on the Raspberry Pi.

In this post, I’ll give you a quick overview of what a Python program is, what Python programs can be used for, and how to write and run a simple Python program on the Raspberry Pi. What is a Python Program? Python is a very useful programming language that has an easy to read syntax, and allows programmers to use fewer lines of code than would be possible in languages such as assembly, C, or Java.

The Python programming language actually started as a scripting language for Linux. Python programs are similar to shell scripts in that the files contain a series of commands that the computer executes from top to bottom. Compare a “hello world” program written in C to the same program written in Python: Unlike C programs, Python programs don’t need to be compiled before running them. It is possible to run Python programs without the Python interpreter installed though.

How to Setup an I2C LCD on the Raspberry Pi - Circuit Basics. Remote Connect Raspberry Pi with SSH VNC HTTP. The menu selections for SSH, http, and VNC are provided as shortcuts to quickly install Weaved Service connections for the 3 most popular network applications. You can also create Weaved connections for any TCP based host by selecting option 4, “Custom (TCP)” from the Protocol Selection Menu.